The website with PR of 4 had copy paste content for different cities that it serviced as well as many questionable backlinks that look purchased or are entirely unrelated to what the website was about. Suprised this website has a PR of 4 after penguin / panda.
The website with PR of 0 had a blog page where the user was adding new blog posts probably once a week. Even though the blogs weren't being commented on/ tweed/ liked on FB very much it seems that regularly generating related blog content of some sort helps push you up in the rankings even if your PR is 0.
Is this observation correct (regular blogging helps increase ranking)?